JC Uknz , Nov 02, 2011; 04:04 p.m.
I suspect for the subject in question it is a more a case of which lens to fit the DSLR, any DSLR, with. Many suggest the 50mm f/1.8 to isolate the child from the inevitable clutter of the home while some suggest with good examples a 35mm or so fast lens. Certainly not the kit lens which is probably slow to start with and even slower as you zoom out. But working at these large apertures is a skill to be learnt and auto isn't going to help somebody used to a P&S.
Different cameras, different problems .... unfortunately ... no magic bullet.